Octopus deployment passing with errors - octopus-deploy

Question

I have a job in octopus which has a task to copy few folders from one remote server to another remote server using a powershell script on azure. Inside the powershell I am calling a nodejs script in my repository. It is running fine on my local machine so as well on the octopus server. But it is coming with some warning like below,
13:22:29 Error | Alive[################################################################] 100.0000%
13:22:29 Error | Finished[#############################################################] 100.0000%
13:22:29 Error | Alive[################################################################] 100.0000%
13:22:29 Error | Finished[#############################################################] 100.0000%
13:22:29 Error | Alive[################################################################] 100.0000%
13:22:29 Error | Finished[#############################################################] 100.0000%
13:22:29 Error | WARNING: uploading C:\Octopus\Work\20200610122124-353927-1979\dist\content\14d214dc-6afc-8581-efb8-fad4a024bb05
13:22:29 Error | Alive[################################################################] 100.0000%
13:22:29 Error | Finished[#############################################################] 100.0000%
13:22:29 Error | WARNING: uploading C:\Octopus\Work\20200610122124-353927-1979\dist\content\1f5e7cc3-ce40-cc82-0963-fd044ce161a1
13:22:29 Error | Alive[################################################################] 100.0000%
13:22:29 Error | Finished[#############################################################] 100.0000%
13:22:29 Error | WARNING: uploading C:\Octopus\Work\20200610122124-353927-1979\dist\content\22683897-1a40-cfb4-e59a-7be7637a44d2
13:22:29 Error | Alive[################################################################] 100.0000%
snippet of my powershell script,
if($SourceContext -and $destinationTenantAccess)
{
#Install required libraries to run the migration script
npm i
#Execute migration script
node ./scripts/migrate --sourceEndpoint $SourceEndpoint --destEndpoint $DestinationEndpoint --publishEndpoint $DestPublishEndpoint --sourceId $sourceTenantAccess.Id --sourceKey $sourceTenantAccess.PrimaryKey --destId $destinationTenantAccess.Id --destKey $destinationTenantAccess.PrimaryKey
}
else
{
Write-Error ( "Unable to find SAS Tokens, Developer Portal migration Failed." )
}
The migration script I have used from : https://github.com/Azure/api-management-developer-portal
note this is not failing my build, but I want to remove these errors. Any clue how to fix it ?